Belt-shifting apparatus.



PATENTED JAN. l, 1907.

N. H. ANDERSON. BELT SHIP-TIN@ APPARATUS.

APPLICATION FILED JUNE 4, 1906.

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UNITED STATES PATENT OFFICE.

NILS H. ANDERSON, OF BRIDGEPORT` OONNEOTICT, ASSIGNOR TO BUILDERS IRON FOUNDRY, OF PROVIDENCE, RHODE ISLAND, A vCORPORATION OF RHODE ISLAND.V

Specification of Letters Patent.

Patented J' an. 1, 1907.

Application iiled June 4,1906. Serial No. 320006.

To L7/Z whom t may concern:

Be it known that I, NrLs I-I, ANDERSON, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Belt-Shifting Apparatus, of which the following is a specification.

My invention relates to belt-shifters, such as are used to run a belt from one pulley to another-as, for instance, from a loose pulley to a tight one, and vice versa.

My invention especially refers to. that class of Shifters employing a pull-cord for actuating the device and is thought to be a great improvement upon any of that style of Shifters now upon the market.

It is the purpose of the invention to simplify and cheapen the construction of this particular style of shifter, so as to bring it into more general use. This is made possible, first, by reason of the simplicity of design, and, second, by reason of my ability to so construct it that rough castings may be used with little or no machine-Work upon them further, to produce a shifter which may be adjusted to operate as either a right or left shifter, thus obviating the necessity of building two styles to accommodate the two requirements.

Referring to the accompanying sheet of drawings,forming a part of this specification, similar characters of reference denote like or corresponding parts throughoutl the several figures, and of which- Figure -1 shows a front elevation of my improved shifter complete, the front plate of the casing being detached. Fig. 2 is a central vertical cross-section taken on line 2 2 of Fig. 1. Fig. 3 is a `reversed sideelevation of the slide shown in Fig. 1. Fig. 4 shows a side elevation and edge view, respectively, of the rocker-wheel contained within the casing, as shown in Figs. 1 and 2, and Fig. 5 shows a detail perspective view ofthe springactuated engaging pawl whichoperates through the rocker-wheel, as will later be described.

Referring in detail to the reference characters marked upon the drawin s, a indicates a hanger which is adapted or attachment to the ceiling or other suitable place. In this hanger is j ournaled a short countershaft a', carrying a tight and loose pulley l) and b', respectively, upon one end and a driving-pulley c upon the opposite end, said tight pulley serving to communicate power to the shaft, While the driving-pulley c is designed totransmit it to a machine. (Not shown.) The hanger c is provided with a right-angular projection c/, containing a stud d and supporting a casing oV, which may be provided with a detachable cover e and designed to inclose the mechanism of my invention. The stud d contains a reduced bearing f, upon which is mounted a rockerpulley j", that is retained in position by the nut g and washer g. 'A belt-slide 7L, having an oblong opening 7L to receive the hub of the pulley, is slidably mounted intermediate of the pulley and washer g and loosely guided 1n openings i of thecasing. Oneend of this slide is provided with arms i to `engage and shift the belt. (Not shown.) A spring y' is connected intermediate of the rocker-pulley f and the casing to hold said pulley in its normal position, as seen in Fig. l. A pull-cord 7c is also attached in a groove of the periphery of said pulley and is carried off in an opposite direction from that of the spring y' and out through an opening of the casing and serves as the means for operating the pulley against the .action of the said spring. At the rear of the rocker-pulley I provide a bifurcated pawl Z, having two engaging fingers Z and m, which freely pass through openings m in the pulley and alternately engage in notches n and n in the side of the slide by reason of the action of a spring o and sleeve o', mounted upon the said bearing f. The shape of the notches n and n are alike, with one edge tapered, as shown, and having theirl greatest depth at their narrow and shoulder end p.

Referring again to Fig. l, it Will be seen that by puIling the cord c the pulley will be turned against the action of thespring j and that the pawl Zwill also be moved'therewith and that by reason of the engagement of the lower finger m of the awl Zwith the shoulder of the notch n the s ide will be shoved over suiiiciently to shift the belt from the tight to the loose pulley. With the completion of the throw of the slide as above and the releasement of the cord the spring acts to turn the pulley back to its normal position, thus IOC' IOS

ping and pockets r causing the finger m to ride up out of the notch n of the slide and move back with the pulley. The opposite finger l will then seat itself in the upper notch n of the slide in posi tion to throw the said slide back again with the next pull of the cord. It will be seen that the opposite fingers of the pawl alternately engage the notches of the slide to shift it first in one direction and then in the other with each successive manipulation of the cord, thus requiring the same operation for both purposes and avoiding any possibility of confusion by improper manipulation should the belt require to be shifted quickly.

The slide h is provided with a pair of notches n and in on each side. Either pair of these can be used for the engagement of the fingers l and 'm of the pawl, which allows said slide to be shifted and operated end for end, as in cases where the pulleys l) and b would have to be located at the opposite end of the casing, thus making the device serve as both a right and left, adapting it for most any conditions or location of a machine.

The slide is further provided with stops to Y determine the amount of its movement and to prevent the belt and slide from workingback after it has been shifted. These stops comprise a pair of pins or lugs g and q', sc cured to the side of the rocker-pulley, one of which pins serves to engage suitable pockets r, r', r, and 1" in the upper edge of the slide and the other to engage similar pockets s, s', s,vand 8 in the lower edge of the slide. As assembled and positioned m Fig. 1, the upper serve to lock the slide against moving to the left, and the lower pin g and pocket s prevent it from moving in the opposite direction, while pockets r and s serve as stops for the respective pms when the cord is pulled out and the slide shifted to its outer position. The pockets 7" and r', s and 8 serve as abutting-stops against 'which the pins strike when the cord is operated.

Reckoning an operation of these parts from their positions as seen in Fig. l, a pull of the cord would throw the wheel over to the left, the slide out to the right, causing the upper pin to move from its pocket r" to the end notch r, while the lower pin Q would move to pocket s, as indicated in dotted lines, Fig. 3, which would limit the amount of movement of all the parts. The releasement of the cord would permit the spring to throw the wheel back, its upper pin g moving back to the lock-pocket r and the lower pin to the pocket s, (see dotted lines,) which again locks the slide from movement in either direction. The next operation of the cord for the return shift of the slide causes the upper pin to travel out from the pocket r, striking the pocket 7", and then with the releasement of the cord it goes back and seats itself in the end pocket 7, as shown in Fig.

nation of a stud and pulley mounted thereon,

a spring for holding the pulley in its normal position, a belt-slide and a pawl on the pulley and adapted to engage the slide to alternately shift it in opposite directions with the successive manipulations of the wheel.

2. In a belt-shifting apparatus, the combination of a stud, a pulley mounted thereon a spring to hold it in a normal position7 a cord to rock the pulley, a belt-slide adjoining the pulley, a pawl carried by the pulley bearing fingers to engage the slide,I and a spring to normally hold the pawl into engagement with the slide.

3. In a belt-shifting apparatus, the combination of a hanger bearing a stud, a casing inclosing the stud, a rocker-pulley mounted upon the stud, a spring to hold the pulley in its normal position, a cord to rock the same against the action of the spring, a slide having notches, and a spring-actuated pawl carried by the pulley with fingers to engage the notches of the slide.

4. In a belt-shifting apparatus, the combination of a shouldered stud, a rocker-pulley mounted against said shoulder and bearing a sleeve, a belt-slide mounted upon the sleeve of the pulley, a pawl having a pair of fingers passing through openings ofthe pulley to engage the slide, a sleeve upon the stud to engage the pawl and a spring adapted to hold the pawl against the slide.

5. In a belt-shifting apparatus, the combination of a belt-slide h-aving notches in its side, a rocker-pulley adjoining the slide, means for imparting a rocker movement to said pulley, a double-'pointed pawl carried by the pulley adapted to alternately engage the notches of the slide in a way to move the slide first in one direction and then the vother by the movement of the pulley.

6. In a belt-shifting apparatus of the class described, the combination with a stud, of a rocker-pulley mounted thereonhaving holes therethrough, a spring-actuated pawl With fingers passing through the holes of the pulley, a spring to normally hold said pawl in such position, and a beltslide adjacent to the pawl having notches for the en agement of the fingers of the pawl and Where y said slide is operated in opposite directions with the successive operations of the pulley.

7. In a belt-pulley-shifting apparatus, the

IOO

combination of a pulley and means for imparting thereto a rocker movement, a beltslide adjoining the ulley, a paWl carried by the pulley having ngers to engage notches on the slide, and a spring to hold said iingers in such engagement, and a casing to inclose said mechanism.

8. In a belt-pulley-shifting apparatus, the combination of a belt-slide having a series of pockets in its opposite edges, a rocker-pulley adjoining the slide having pins to engage the pockets of said slide to retain the same in its respective positions, and means carried by the rocker-pulley for shifting said slide in opposite directions.

9. In a belt-shifting apparatus, the combination of a pulley-slide bearing a series of pockets in its edges, a rocker-pulley adjacent to the slide, a paWl carried by the pulley to engage the slide and shift the same in opposite directions With each manipulation of the pulley, and pins upon the pulley to engage the pockets of the slide to hold the same against lateral movement.

10. In a belt-shifting apparatus, the combination with a slide having pockets in its edges and notches in its sides, oi a rocker- Wheel having pins to engage the pockets to lock the slide, a paWl carried by the pulley adapted to engage the notches of the slide, and means for imparting to the pulley a rocker movement. Y

Signed at Syracuse, in the county of Onondaga and State oi New York, this 26th day of May, A.. D. 1906.

NILS H. ANDERSON.

Witnesses:

ARTHUR F. MUNDZ, GEO. J. DASH. 

